we had robert goddard and they had constantine. the two were equivalent. we knew that russia was our competitors. but in our day-to-day life, getting up in the morning to go to work, we had enough on our plate to not have to worry about what was on the russians plate at the time. yes, we knew about them, but it was like looking at them through a scrim, you might say, or some sort of filter. host: you might remember that walter cronkite was deeply involved in the space program and cared about it a lot. i was the moscow correspondent. cbs abouto much at putting it into a global context that it would fly me from moscow to cape canaveral to add to what i thought was the russian component. where are the russians in space compared to us? did you have a feeling of being behind? mike: that's a good question and i don't have a good answer. i think there were times when we felt about even stephen, may be behind. toward the latter years, i felt we were surging ahead. -- i would call year zero being 1969, the year of the first lunar landing, but i would say going back

we knew they had a very powerful background from the point of view of space history. , they hadert goddard- there were two astronauts who were about equivalent, you might say. we knew that russia was our competitors. but in our day-to-day life, getting up in the morning to go to work, we had enough on our plate to not have to worry about what was on the russians played at the time. yes, we knew about them, but it was like looking at them through a scrim, you might say, or some sort of filter. host: you might remember that walter cronkite was deeply involved in the space program and cared about it a lot. the moscowhat time, .orrespondent for cbs we cared at cbs so much about putting it a global context, that we would fly to cape canaveral and compare it to the russian. did you have a feeling of being behind? that you had to catch up? mike: that's a good question and i don't have a good answer. i think there were times when we felt even stephen, may be be behind. toward the latter years, i felt we were surging ahead. i would call year zero being 1969, the year of the first lunar landing, but

the first b-52 is expected to arrive in goddard today and the airport craft expected to pass through the suez canal by tomorrow. this latest confrontation comes exactly one year after the trump administration withdrew from a deal iran signed with the u.s. and five other countries to temporarily freeze its nuclear program. >> the iran deal is defective at its core. >> reporter: other signatories to the nuclear deal have 60 days to help iran sell oil and gain access to international banking services, otherwise iran will scale up its u rain yranium enr program and that would tech neckly mean the end of the agreement. >> we were able to get that very frightening program into a box. >> reporter: jared wong, the state department coordinator from iran implementation under president obama. >> walking away from that and threatening that nonproliferation achievement, it threatens everybody. >> reporter: the 60-day clock is now ticking. if iran withdraws from the nuclear agreement, it will consider itself free to begin enriching uranium to bomb-grade levels. >> david martin, thank you very much

goddard: we have to figure out what the victim is in terms of species. it may be legal to kill a cerertain spececies or pererfy illegal, depepending on its gens and i its species. we can a anae the dna o of a tree, then we can extract dna from that plank, which is alall we need to examie the oils s to determine this ges and specieses. we are the first crcrime lab evever to haveve a xylariuum, where e we use thehen sampleles to identntify wood eviidence. lancaster: so a xylarium is for wood what a librarary is for books. it's where we house a all the different wood blocks that allow us to look at reference material when we get a new sasample. and so, if we e get an uunknown and we have a an idea f what it is, we can build a populationon based on n what wee here. there are wood d collectis all over the world, and we partner with a lot of them in order to build what you see here. we have probably close to or over 15,000 different wood blockcks or slivers in thisis r, and that really encompasses an incredibible portion o of commel woods that are imported int